I got the email from TiVo since I am Series 3 lifetime owner for the first time on 11/4/13 and most recently four the fourth time just last week 12/30/13. Today I went to try and use it however and the code has expired according to web site. Email says it is good until 1/31/14 though? I called TiVo and they said yep expired but don't know why. I really wanted it more to price match at Best Buy the $499.99 price so I could get 5X points on purchase today. I guess I will try to price match with the flyer email rather than checkout screen.
Just wanted to give others a heads up that the codes may be expiring sooner than later.